I get on fine with my SIL but I really can't abide my nephews. They're little brats, scream & fight constantly and because their parents can't be bothered actually parenting them they are constantly on their computers for hours and are in general little shits. My two end up coming back either behaving like them or upset that they wouldn't actually play with them. Just tend to avoid unless inevitable ie they get in totouch because they want something!!